Аннотации:
The design, construction, and maintenance of pile foundations are dependent on special weather conditions
in Northern and Central part of Kazakhstan. The winter months in these areas are very long which starts from
November to March and the air temperature usually reaches – 40-50°C. These circumstances lead to the
seasonal freezing ground, special physical behavior of soil, physical properties of construction materials. The
main problem of pile driving in winter is frozen ground which is difficult to excavate and driving. Moreover,
the Static Load Tests for estimating the bearing capacity of pile foundations do not show accurate records in
frozen soil. To solve the problems mentioned above, a special antifreeze composition has been developed
and established its protective effect against soil freezing in winter. The implementation of the proposed
method leads to a high productivity of driving reinforced concrete piles without the risk of their destruction.
This eliminates the need for additional drilling works and more powerful and expensive rock drills, if the soil
is protected from freezing. According to a special formula, the optimal mass of antifreeze is calculated, which
allows protecting the soil without harming not only the soil, but also the structure of the concrete pile and the
environment. During the static load test, piles driven into soil that had been covered with antifreeze has
showed more accurate bearing capacity data. Scientific and experimental studies have established that
antifreeze reduces the compressibility of frozen soil.
